/*
XPTracker - Alternative Agile Tracking Tool
Copyright (C) 2006-2009  Stephen Starkey

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
*/
package org.xptracker.web;

import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;

public class RequestInjectionFilter implements Filter {
  static ThreadLocal<HttpServletRequest> request;

  public void init(FilterConfig filterConfig) throws ServletException {
    request = new ThreadLocal<HttpServletRequest>();
  }

  public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain chain) throws IOException, ServletException {
    if (servletRequest instanceof HttpServletRequest) {
      HttpServletRequest req = ((HttpServletRequest) servletRequest);
      request.set(req);
    }

    try {
      chain.doFilter(servletRequest, servletResponse);
    } finally {
      request.remove();
    }
  }

  public void destroy() {
    //noop
  }
}
